Some speculatively useful things that could arise out of this -

It may have useful security properties over time. People use emacs for a great deal of arbitrary text reading and transform from things directly from email and the web. Elisp would largely be at fault for security bugs but perhaps this would help in areas.

Perhaps a binding to use Alacritty directly for a port to Wayland? Emacs has a pretty terminal centric view of its UI output as is.

A tight binding to Servo allowing a serious upgrade to Emacs visual and ui capabilities.